世界上绝大多数人在日常生活中习惯使用右手,只有约10％的人习惯使用左手,人们常称惯用左手的人为“左撇子”。 现今,科学家已基本断定,人们偏爱使用左手或是右手的习惯,不完全是后天养成的,先天性因素起到了主要作用。人类的大脑分为左右两大半球。左侧大脑半球支配右侧肢体的运动,右侧大脑半球支配左 Most people in the world are accustomed to using their right hands in their daily life. Only about 10% of them are accustomed to using the left hand, and people who often use left-handed people are often called “lefties.” Nowadays, scientists have basically concluded that people prefer to use left-handed or right-handed habits, which are not completely acquired. Congenital factors play a major role. The human brain is divided into two major hemispheres. The left hemisphere dominates the movement of the right limb and the right hemisphere dominates the left